During start up, large squirrel cage motors and synchronous motors have the undesirable characteristic of drawing up to 6 or 8 times normal running current from the power source. This start up current is at its peak the moment that power is applied and gradually diminishes to load running current as the motor reaches normal speed. Substantial voltage drop on the feeder lines often the result and it may be severe enough to cause contactors to drop out, light flickering and malfunction of other electrical or electronic equipment connected to the feeder lines.